'use client'
import { useQuery, gql } from '@/lib/graphql/hooks'
import Link from 'next/link'
import { TeamFlag } from '@/components/team-flag'

const HISTORY_QUERY = gql`
  query History {
    tournaments {
      year host winner runnerUp thirdPlace fourthPlace
      totalGoals matchesCount teamsCount avgGoalsPerGame
      topScorers(limit: 1) { playerName goals team { name iso2 } }
    }
  }
`

interface Tournament {
  year: number; host: string; winner?: string | null; runnerUp?: string | null
  thirdPlace?: string | null; fourthPlace?: string | null
  totalGoals?: number | null; matchesCount?: number | null; teamsCount?: number | null
  avgGoalsPerGame?: string | number | null
  topScorers: Array<{ playerName: string; goals: number; team?: { name: string; iso2?: string | null } | null }>
}

function HostIso(host: string): string {
  const map: Record<string, string> = {
    'Uruguay': 'uy', 'Italy': 'it', 'France': 'fr', 'Brazil': 'br',
    'Switzerland': 'ch', 'Sweden': 'se', 'Chile': 'cl', 'England': 'gb-eng',
    'Mexico': 'mx', 'Germany': 'de', 'Argentina': 'ar', 'Spain': 'es',
    'South Korea / Japan': 'kr', 'South Africa': 'za', 'Russia': 'ru',
    'Qatar': 'qa', 'USA': 'us', 'USA / Canada / Mexico': 'us',
  }
  return map[host] ?? 'un'
}

export default function HistoryPage() {
  const { data, loading } = useQuery(HISTORY_QUERY)
  const tournaments: Tournament[] = data?.tournaments ?? []
  const is2026InProgress = !tournaments.find(t => t.year === 2026)?.winner

  return (
    <div className="max-w-[1200px] mx-auto px-7 py-10 pb-16">
      <h1 className="font-['Bebas_Neue'] text-[52px] tracking-[0.04em] text-[#22c55e] leading-none mb-2">
        World Cup History
      </h1>
      <p className="text-[#2a5c35] text-sm mb-9">
        Every edition — Uruguay 1930 through 2026 · {tournaments.length} tournaments
      </p>

      {loading && !data && (
        <div className="grid grid-cols-[repeat(auto-fill,minmax(238px,1fr))] gap-3.5">
          {Array.from({ length: 24 }).map((_, i) => (
            <div key={i} className="h-52 rounded-2xl animate-pulse" style={{ background: '#0a1810' }} />
          ))}
        </div>
      )}

      <div className="grid grid-cols-[repeat(auto-fill,minmax(238px,1fr))] gap-3.5">
        {tournaments.map(t => {
          const inProgress = t.year === 2026 && is2026InProgress
          const topScorer = t.topScorers?.[0]
          return (
            <Link key={t.year} href={`/tournaments/${t.year}`}>
              <div className="rounded-2xl p-5 relative overflow-hidden cursor-pointer hover:border-[rgba(34,197,94,0.3)] transition-colors"
                style={{ background: '#0a1810', border: '1px solid rgba(34,197,94,0.13)' }}>
                {/* Year watermark */}
                <div className="absolute right-[-6px] bottom-[-18px] font-['Bebas_Neue'] text-[88px] leading-none pointer-events-none select-none"
                  style={{ color: 'rgba(34,197,94,0.04)' }}>
                  {t.year}
                </div>

                <div className="relative">
                  <div className="flex justify-between items-start mb-3.5">
                    <div>
                      <div className="font-['Bebas_Neue'] text-[34px] text-[#22c55e] leading-none">{t.year}</div>
                      <div className="text-xs text-[#2a5c35] mt-0.5 flex items-center gap-1.5">
                        <span className={`fi fi-${HostIso(t.host)} rounded-sm text-sm inline-block`} />
                        {t.host}
                      </div>
                    </div>

                    {inProgress
                      ? <div className="text-[10px] text-[#22c55e] font-bold tracking-[0.12em] bg-[rgba(34,197,94,0.1)] px-2.5 py-1 rounded-full mt-1">
                          IN PROGRESS
                        </div>
                      : t.winner && (
                        <div className="text-right">
                          <TeamFlag name={t.winner} size="md" />
                          <div className="text-[11px] text-[#6abf7a] mt-0.5">{t.winner}</div>
                        </div>
                      )}
                  </div>

                  {!inProgress && t.winner && t.runnerUp && (
                    <div className="rounded-lg px-3 py-2 text-xs text-[#6abf7a] mb-3"
                      style={{ background: 'rgba(34,197,94,0.07)' }}>
                      <span className="font-semibold text-[#dff5e8]">{t.winner}</span>
                      <span className="mx-2 text-[#2a5c35]">def.</span>
                      {t.runnerUp}
                    </div>
                  )}

                  <div className="flex gap-3.5 text-[11px] text-[#2a5c35] flex-wrap">
                    {t.totalGoals != null && <span>⚽ {t.totalGoals}</span>}
                    {t.matchesCount != null && <span>🗓 {t.matchesCount} games</span>}
                    {t.teamsCount != null && <span>🏳 {t.teamsCount} teams</span>}
                  </div>

                  {topScorer && (
                    <div className="mt-2 text-[10px] text-[#1a3a22]">
                      Golden Boot: <span className="text-[#2a5c35]">{topScorer.playerName} ({topScorer.goals}⚽)</span>
                    </div>
                  )}
                </div>
              </div>
            </Link>
          )
        })}
      </div>
    </div>
  )
}